/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 00:20:47,049 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 00:20:47,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:20:47,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:20:47,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:20:47,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:20:47,118 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:20:47,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:20:47,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:20:47,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:20:47,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:20:47,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:20:47,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:20:47,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:20:47,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:20:47,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:20:47,136 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:20:47,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:20:47,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:20:47,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:20:47,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:20:47,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:20:47,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 00:20:47,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:20:47,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:20:47,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:20:47,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:20:47,192 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:20:47,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:20:47,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:20:47,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:20:47,194 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:20:47,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:20:47,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:20:47,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:20:47,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:20:47,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:20:47,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:20:47,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:20:47,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:20:47,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:20:47,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:20:47,196 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:20:47,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:20:47,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:20:47,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:20:47,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:20:47,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:20:47,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:20:47,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:20:47,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:20:47,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:20:47,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:20:47,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:20:47,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:20:47,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:20:47,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:20:47,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:20:47,511 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:20:47,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:20:47,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:20:47,519 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:20:47,520 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 00:20:47,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dc73c6ec/59154bd3e35d4ff59ade4b4db26d05aa/FLAG2794105b6 [2020-08-19 00:20:48,069 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:20:48,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-19 00:20:48,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dc73c6ec/59154bd3e35d4ff59ade4b4db26d05aa/FLAG2794105b6 [2020-08-19 00:20:48,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dc73c6ec/59154bd3e35d4ff59ade4b4db26d05aa [2020-08-19 00:20:48,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:20:48,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:20:48,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:48,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:20:48,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:20:48,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743cee4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48, skipping insertion in model container [2020-08-19 00:20:48,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:20:48,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:20:48,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:48,648 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:20:48,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:20:48,695 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:20:48,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48 WrapperNode [2020-08-19 00:20:48,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:20:48,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:20:48,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:20:48,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:20:48,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... [2020-08-19 00:20:48,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:20:48,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:20:48,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:20:48,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:20:48,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:20:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:20:48,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:20:48,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:20:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:20:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 00:20:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:20:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:20:48,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:20:49,246 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:20:49,246 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-19 00:20:49,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:49 BoogieIcfgContainer [2020-08-19 00:20:49,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:20:49,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:20:49,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:20:49,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:20:49,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:20:48" (1/3) ... [2020-08-19 00:20:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f77f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:49, skipping insertion in model container [2020-08-19 00:20:49,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:20:48" (2/3) ... [2020-08-19 00:20:49,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f77f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:20:49, skipping insertion in model container [2020-08-19 00:20:49,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:20:49" (3/3) ... [2020-08-19 00:20:49,276 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-19 00:20:49,285 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:20:49,292 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:20:49,305 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:20:49,330 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:20:49,331 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:20:49,331 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:20:49,331 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:20:49,331 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:20:49,331 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:20:49,332 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:20:49,332 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:20:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-19 00:20:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 00:20:49,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:49,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:49,361 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-19 00:20:49,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:49,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552843009] [2020-08-19 00:20:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:49,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552843009] [2020-08-19 00:20:49,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:49,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:49,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949972620] [2020-08-19 00:20:49,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:49,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,588 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-19 00:20:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:49,656 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-19 00:20:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:49,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 00:20:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:49,670 INFO L225 Difference]: With dead ends: 81 [2020-08-19 00:20:49,670 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 00:20:49,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 00:20:49,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-19 00:20:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 00:20:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-19 00:20:49,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-19 00:20:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:49,716 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-19 00:20:49,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-19 00:20:49,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 00:20:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:49,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:49,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:20:49,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:49,720 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-19 00:20:49,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:49,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460318845] [2020-08-19 00:20:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:49,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460318845] [2020-08-19 00:20:49,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:49,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:49,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758478812] [2020-08-19 00:20:49,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:49,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:49,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,797 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-19 00:20:49,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:49,839 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-19 00:20:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:49,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-19 00:20:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:49,842 INFO L225 Difference]: With dead ends: 107 [2020-08-19 00:20:49,842 INFO L226 Difference]: Without dead ends: 66 [2020-08-19 00:20:49,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-19 00:20:49,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-19 00:20:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-19 00:20:49,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-19 00:20:49,855 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-19 00:20:49,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:49,855 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-19 00:20:49,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-19 00:20:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 00:20:49,857 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:49,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:49,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:20:49,858 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-19 00:20:49,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:49,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771973589] [2020-08-19 00:20:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:49,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:49,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771973589] [2020-08-19 00:20:49,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:49,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:49,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019808741] [2020-08-19 00:20:49,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:49,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:49,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,924 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-19 00:20:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:49,956 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-19 00:20:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:49,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 00:20:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:49,958 INFO L225 Difference]: With dead ends: 99 [2020-08-19 00:20:49,959 INFO L226 Difference]: Without dead ends: 69 [2020-08-19 00:20:49,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-19 00:20:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-19 00:20:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 00:20:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-19 00:20:49,970 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-19 00:20:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:49,971 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-19 00:20:49,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-19 00:20:49,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 00:20:49,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:49,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:49,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:20:49,973 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:49,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:49,974 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-19 00:20:49,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:49,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727674763] [2020-08-19 00:20:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727674763] [2020-08-19 00:20:50,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213006172] [2020-08-19 00:20:50,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,057 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-19 00:20:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,091 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-19 00:20:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 00:20:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,094 INFO L225 Difference]: With dead ends: 124 [2020-08-19 00:20:50,094 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 00:20:50,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 00:20:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-19 00:20:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 00:20:50,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-19 00:20:50,112 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-19 00:20:50,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,112 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-19 00:20:50,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-19 00:20:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 00:20:50,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:20:50,118 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,118 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-19 00:20:50,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078492352] [2020-08-19 00:20:50,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078492352] [2020-08-19 00:20:50,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95876956] [2020-08-19 00:20:50,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,210 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-19 00:20:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,249 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-19 00:20:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,250 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-19 00:20:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,254 INFO L225 Difference]: With dead ends: 204 [2020-08-19 00:20:50,254 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 00:20:50,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 00:20:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-19 00:20:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-19 00:20:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-19 00:20:50,287 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-19 00:20:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,288 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-19 00:20:50,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-19 00:20:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:20:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:20:50,296 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-19 00:20:50,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779537929] [2020-08-19 00:20:50,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779537929] [2020-08-19 00:20:50,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257162642] [2020-08-19 00:20:50,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,351 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-19 00:20:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,371 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-19 00:20:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 00:20:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,373 INFO L225 Difference]: With dead ends: 183 [2020-08-19 00:20:50,373 INFO L226 Difference]: Without dead ends: 126 [2020-08-19 00:20:50,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-19 00:20:50,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-19 00:20:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-19 00:20:50,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-19 00:20:50,386 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-19 00:20:50,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,387 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-19 00:20:50,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-19 00:20:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:20:50,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:20:50,389 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-19 00:20:50,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973000862] [2020-08-19 00:20:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973000862] [2020-08-19 00:20:50,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589522850] [2020-08-19 00:20:50,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,444 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-19 00:20:50,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,466 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-19 00:20:50,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 00:20:50,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,469 INFO L225 Difference]: With dead ends: 228 [2020-08-19 00:20:50,469 INFO L226 Difference]: Without dead ends: 226 [2020-08-19 00:20:50,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-19 00:20:50,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-19 00:20:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 00:20:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-19 00:20:50,482 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-19 00:20:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,483 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-19 00:20:50,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-19 00:20:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 00:20:50,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:20:50,485 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,486 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-19 00:20:50,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373699027] [2020-08-19 00:20:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373699027] [2020-08-19 00:20:50,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771141191] [2020-08-19 00:20:50,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,518 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-19 00:20:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,539 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-19 00:20:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,540 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 00:20:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,542 INFO L225 Difference]: With dead ends: 392 [2020-08-19 00:20:50,542 INFO L226 Difference]: Without dead ends: 234 [2020-08-19 00:20:50,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-19 00:20:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-19 00:20:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-19 00:20:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-19 00:20:50,560 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-19 00:20:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,561 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-19 00:20:50,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-19 00:20:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:50,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:20:50,563 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-19 00:20:50,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821653874] [2020-08-19 00:20:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821653874] [2020-08-19 00:20:50,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106752331] [2020-08-19 00:20:50,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,594 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-19 00:20:50,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,613 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-19 00:20:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:50,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,616 INFO L225 Difference]: With dead ends: 348 [2020-08-19 00:20:50,616 INFO L226 Difference]: Without dead ends: 238 [2020-08-19 00:20:50,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-19 00:20:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-19 00:20:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-19 00:20:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-19 00:20:50,632 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-19 00:20:50,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,633 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-19 00:20:50,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-19 00:20:50,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:50,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:20:50,641 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-19 00:20:50,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498322789] [2020-08-19 00:20:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498322789] [2020-08-19 00:20:50,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156996328] [2020-08-19 00:20:50,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,731 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-19 00:20:50,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,771 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-19 00:20:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,782 INFO L225 Difference]: With dead ends: 428 [2020-08-19 00:20:50,783 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 00:20:50,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 00:20:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-19 00:20:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-19 00:20:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-19 00:20:50,805 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-19 00:20:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,807 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-19 00:20:50,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-19 00:20:50,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 00:20:50,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:20:50,817 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-19 00:20:50,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689074558] [2020-08-19 00:20:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689074558] [2020-08-19 00:20:50,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241926642] [2020-08-19 00:20:50,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,888 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-19 00:20:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,915 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-19 00:20:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,916 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-19 00:20:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:50,919 INFO L225 Difference]: With dead ends: 764 [2020-08-19 00:20:50,919 INFO L226 Difference]: Without dead ends: 450 [2020-08-19 00:20:50,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-19 00:20:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-19 00:20:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-19 00:20:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-19 00:20:50,940 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-19 00:20:50,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:50,941 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-19 00:20:50,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:50,941 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-19 00:20:50,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:50,942 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:50,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:50,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:20:50,943 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:50,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-19 00:20:50,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:50,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368786412] [2020-08-19 00:20:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:50,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368786412] [2020-08-19 00:20:50,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:50,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:50,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096772366] [2020-08-19 00:20:50,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:50,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:50,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:50,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:50,976 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-19 00:20:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:50,999 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-19 00:20:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:50,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:51,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,002 INFO L225 Difference]: With dead ends: 672 [2020-08-19 00:20:51,003 INFO L226 Difference]: Without dead ends: 458 [2020-08-19 00:20:51,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-19 00:20:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-19 00:20:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-19 00:20:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-19 00:20:51,020 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-19 00:20:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,021 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-19 00:20:51,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-19 00:20:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:51,022 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:20:51,023 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-19 00:20:51,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986919500] [2020-08-19 00:20:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986919500] [2020-08-19 00:20:51,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249344362] [2020-08-19 00:20:51,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,051 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-19 00:20:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,076 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-19 00:20:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,081 INFO L225 Difference]: With dead ends: 812 [2020-08-19 00:20:51,082 INFO L226 Difference]: Without dead ends: 810 [2020-08-19 00:20:51,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-19 00:20:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-19 00:20:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-19 00:20:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-19 00:20:51,103 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-19 00:20:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,104 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-19 00:20:51,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-19 00:20:51,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 00:20:51,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:20:51,106 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-19 00:20:51,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309136610] [2020-08-19 00:20:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309136610] [2020-08-19 00:20:51,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616364813] [2020-08-19 00:20:51,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,134 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-19 00:20:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,162 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-19 00:20:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-19 00:20:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,168 INFO L225 Difference]: With dead ends: 1500 [2020-08-19 00:20:51,168 INFO L226 Difference]: Without dead ends: 874 [2020-08-19 00:20:51,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-19 00:20:51,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-19 00:20:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-19 00:20:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-19 00:20:51,203 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-19 00:20:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,204 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-19 00:20:51,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-19 00:20:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:20:51,206 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-19 00:20:51,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24530713] [2020-08-19 00:20:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24530713] [2020-08-19 00:20:51,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206633980] [2020-08-19 00:20:51,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,235 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-19 00:20:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,265 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-19 00:20:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,271 INFO L225 Difference]: With dead ends: 1308 [2020-08-19 00:20:51,271 INFO L226 Difference]: Without dead ends: 890 [2020-08-19 00:20:51,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-19 00:20:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-19 00:20:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-19 00:20:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-19 00:20:51,320 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-19 00:20:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,321 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-19 00:20:51,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-19 00:20:51,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:51,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:20:51,323 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,323 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-19 00:20:51,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309684832] [2020-08-19 00:20:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309684832] [2020-08-19 00:20:51,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597030881] [2020-08-19 00:20:51,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,348 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-19 00:20:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,380 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-19 00:20:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,388 INFO L225 Difference]: With dead ends: 1548 [2020-08-19 00:20:51,389 INFO L226 Difference]: Without dead ends: 1546 [2020-08-19 00:20:51,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-19 00:20:51,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-19 00:20:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-19 00:20:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-19 00:20:51,428 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-19 00:20:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,429 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-19 00:20:51,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-19 00:20:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 00:20:51,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:20:51,432 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-19 00:20:51,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636315539] [2020-08-19 00:20:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636315539] [2020-08-19 00:20:51,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078336256] [2020-08-19 00:20:51,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,456 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-19 00:20:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,500 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-19 00:20:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-19 00:20:51,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,509 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 00:20:51,509 INFO L226 Difference]: Without dead ends: 1706 [2020-08-19 00:20:51,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-19 00:20:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-19 00:20:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-19 00:20:51,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-19 00:20:51,565 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-19 00:20:51,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,565 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-19 00:20:51,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-19 00:20:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:51,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:20:51,569 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-19 00:20:51,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720670258] [2020-08-19 00:20:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720670258] [2020-08-19 00:20:51,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390807036] [2020-08-19 00:20:51,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,591 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-19 00:20:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,645 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-19 00:20:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,646 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:51,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,656 INFO L225 Difference]: With dead ends: 2556 [2020-08-19 00:20:51,656 INFO L226 Difference]: Without dead ends: 1738 [2020-08-19 00:20:51,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-19 00:20:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-19 00:20:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-19 00:20:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-19 00:20:51,735 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-19 00:20:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,736 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-19 00:20:51,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-19 00:20:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:51,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:20:51,739 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-19 00:20:51,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91145446] [2020-08-19 00:20:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:51,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91145446] [2020-08-19 00:20:51,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:51,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:51,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648690745] [2020-08-19 00:20:51,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:51,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:51,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,775 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-19 00:20:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:51,862 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-19 00:20:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:51,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:51,880 INFO L225 Difference]: With dead ends: 2956 [2020-08-19 00:20:51,880 INFO L226 Difference]: Without dead ends: 2954 [2020-08-19 00:20:51,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-19 00:20:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-19 00:20:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-19 00:20:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-19 00:20:51,984 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-19 00:20:51,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:51,985 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-19 00:20:51,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-19 00:20:51,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 00:20:51,992 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:51,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:51,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 00:20:51,992 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:51,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:51,993 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-19 00:20:51,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:51,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353141292] [2020-08-19 00:20:51,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:52,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353141292] [2020-08-19 00:20:52,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:52,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:52,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461650113] [2020-08-19 00:20:52,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:52,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:52,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:52,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,027 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-19 00:20:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:52,109 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-19 00:20:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:52,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-19 00:20:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:52,126 INFO L225 Difference]: With dead ends: 5836 [2020-08-19 00:20:52,126 INFO L226 Difference]: Without dead ends: 3338 [2020-08-19 00:20:52,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-19 00:20:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-19 00:20:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-19 00:20:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-19 00:20:52,232 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-19 00:20:52,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:52,233 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-19 00:20:52,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-19 00:20:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:52,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:52,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:52,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 00:20:52,241 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:52,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:52,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-19 00:20:52,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:52,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052649789] [2020-08-19 00:20:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:52,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052649789] [2020-08-19 00:20:52,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:52,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:52,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675836936] [2020-08-19 00:20:52,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:52,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:52,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,264 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-19 00:20:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:52,324 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-19 00:20:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:52,325 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:52,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:52,341 INFO L225 Difference]: With dead ends: 5004 [2020-08-19 00:20:52,341 INFO L226 Difference]: Without dead ends: 3402 [2020-08-19 00:20:52,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-19 00:20:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-19 00:20:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-19 00:20:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-19 00:20:52,466 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-19 00:20:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:52,467 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-19 00:20:52,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-19 00:20:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:52,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:52,472 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:52,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 00:20:52,472 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:52,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-19 00:20:52,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:52,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063630874] [2020-08-19 00:20:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:52,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063630874] [2020-08-19 00:20:52,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:52,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:52,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249434820] [2020-08-19 00:20:52,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:52,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:52,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,510 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-19 00:20:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:52,644 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-19 00:20:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:52,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:52,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:52,698 INFO L225 Difference]: With dead ends: 9804 [2020-08-19 00:20:52,699 INFO L226 Difference]: Without dead ends: 6538 [2020-08-19 00:20:52,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-19 00:20:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-19 00:20:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 00:20:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-19 00:20:52,909 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-19 00:20:52,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:52,910 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-19 00:20:52,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-19 00:20:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 00:20:52,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:52,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:52,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 00:20:52,920 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-19 00:20:52,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:52,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430055828] [2020-08-19 00:20:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:52,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430055828] [2020-08-19 00:20:52,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:52,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:52,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895887358] [2020-08-19 00:20:52,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:52,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:52,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:52,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:52,962 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-19 00:20:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:53,123 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-19 00:20:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:53,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-19 00:20:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:53,139 INFO L225 Difference]: With dead ends: 7052 [2020-08-19 00:20:53,139 INFO L226 Difference]: Without dead ends: 7050 [2020-08-19 00:20:53,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-19 00:20:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-19 00:20:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-19 00:20:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-19 00:20:53,323 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-19 00:20:53,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:53,323 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-19 00:20:53,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:53,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-19 00:20:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:20:53,339 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:53,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:53,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 00:20:53,339 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-19 00:20:53,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:53,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941245165] [2020-08-19 00:20:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:53,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941245165] [2020-08-19 00:20:53,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:53,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:53,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350700874] [2020-08-19 00:20:53,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:53,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,366 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-19 00:20:53,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:53,535 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-19 00:20:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:53,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 00:20:53,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:53,605 INFO L225 Difference]: With dead ends: 10634 [2020-08-19 00:20:53,605 INFO L226 Difference]: Without dead ends: 10632 [2020-08-19 00:20:53,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-19 00:20:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-19 00:20:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-19 00:20:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-19 00:20:53,830 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-19 00:20:53,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:53,830 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-19 00:20:53,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-19 00:20:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 00:20:53,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:20:53,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 00:20:53,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 00:20:53,847 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:20:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:20:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-19 00:20:53,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:20:53,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130593031] [2020-08-19 00:20:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:20:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:20:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:20:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 00:20:53,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130593031] [2020-08-19 00:20:53,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:20:53,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:20:53,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223112352] [2020-08-19 00:20:53,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:20:53,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:20:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:20:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:53,869 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-19 00:20:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:20:54,040 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-19 00:20:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:20:54,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-19 00:20:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:20:54,041 INFO L225 Difference]: With dead ends: 22664 [2020-08-19 00:20:54,041 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 00:20:54,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:20:54,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 00:20:54,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 00:20:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 00:20:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 00:20:54,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-19 00:20:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:20:54,074 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 00:20:54,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:20:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 00:20:54,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 00:20:54,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 00:20:54,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 00:20:54,100 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 00:20:54,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:54,100 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 00:20:54,101 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-19 00:20:54,101 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-19 00:20:54,102 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-19 00:20:54,103 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-19 00:20:54,103 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,103 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-19 00:20:54,103 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,103 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-19 00:20:54,103 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,104 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-19 00:20:54,104 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-19 00:20:54,105 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-19 00:20:54,106 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,106 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-19 00:20:54,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 12:20:54 BoogieIcfgContainer [2020-08-19 00:20:54,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 00:20:54,128 INFO L168 Benchmark]: Toolchain (without parser) took 5730.94 ms. Allocated memory was 147.8 MB in the beginning and 326.6 MB in the end (delta: 178.8 MB). Free memory was 104.2 MB in the beginning and 90.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 192.9 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,129 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 00:20:54,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 93.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,131 INFO L168 Benchmark]: Boogie Preprocessor took 137.13 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 181.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,133 INFO L168 Benchmark]: RCFGBuilder took 416.49 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,137 INFO L168 Benchmark]: TraceAbstraction took 4866.22 ms. Allocated memory was 204.5 MB in the beginning and 326.6 MB in the end (delta: 122.2 MB). Free memory was 162.7 MB in the beginning and 90.1 MB in the end (delta: 72.7 MB). Peak memory consumption was 194.8 MB. Max. memory is 7.1 GB. [2020-08-19 00:20:54,140 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 147.8 MB. Free memory was 103.7 MB in the beginning and 93.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.13 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.3 MB in the beginning and 181.8 MB in the end (delta: -88.5 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 416.49 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4866.22 ms. Allocated memory was 204.5 MB in the beginning and 326.6 MB in the end (delta: 122.2 MB). Free memory was 162.7 MB in the beginning and 90.1 MB in the end (delta: 72.7 MB). Peak memory consumption was 194.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.7s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...